Collapsible core



Y P 1929. 1. J. REMARK 1,709,810

I COLLAPSIBLE CORE Filed June 9, 1923 2 Sheets-Sheet 1 Aplfi] 16, 1929. 1, J, REMARK 7 1,709,810

COLLAPS IBLE CORE Filed June 1923 2 Sheets-Shag} M FM J's/00R: X 195mm;

Het-A' iHiiIElii 8? Q Patented Apr. 16, 1929.

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ISIIDORE J. REMARK, OF AKRON, OHIO, ASSIGNOE TO THE GENERAL TIRE RUB- 1 BER COMPANY, OF AKRON, OHIO,- t. CORPORATION OI OHIO.

COLLAPSIBLE cone.

Application filed June 9,

This invention relates to collapsible cores, such as used in the manufacture of pneumat c tires, and particularly to that type of collapslble core in which all of the sections are perthe axis of the core until out of the original 1 plane thereof, the remaining. sections being then moved inwardly so thatthe tire may be removed. v I I The object of the invention is to mprove upon this existing type of core so as to adapt it for use in the manufacture of tires in which the cross-section al diameter bears a high ratio with respect to the major diameter. For eX- ample, the core shown herein is adapted to the manufacture of 32 X 6 tires, a size which has heretofore been difficult to make in cores of this type as insuflicient room is provlded' for the reception of the collapsing mechanism within the inner core circumference. The invention has for its object the designing of the collapsing mechanism so that it can be oporatively contained within the area bounded by the inner core circumference. I

lVith these and other objects in View, the invention will be readily understood from the showing 7 and description given, it bemg understood that the form and arrangement of parts maybe altered or modified'within the scope of the invention and the appended claims. v i v In the drawings: V Figure 1 is a side elevation of the core taken on the line 1-1 of Figure 2.

Figure 2 is a section on the angular line 2-2 of Figure 1; 1

Figures 3 to 7 are somewhat smaller and illustrate the core in its several positions Figure 3 being a view of the core assembled; Figure 4 a section on the line 4-4 of Figure 3; Figure 5 a view of the core with the key sections Withdrawn on the line 5-5 of Figure 6;

1923'. seen no; 644,335.

5; and Figure? is aplan'view of the core, the

finalposition of the sections intermediate the key sections being shown in dotted lines. 1 Y i The core is mounted to rotate with a'supporting shaft 1"and, as shown, isin four sections, this number being chosen merely for the sake of illustrating'the invention. The key sections, which are-oppositely positioned, areindicated at 2, 2, and the other or intermediate sections at 3, 3. The key sections are tapered outwardly, as shown, to give the necessarydraft which permits the movement of these sections radially between the intermediate sections, the saidsectionsbeing pro vided with sliding'keyw'ays 4 to obtain the correct register of thesections, i

on the shaft lisa bracket or plate 5 which is slidablybut non-rotatably mounted on the in shaft by opposite keys 6 and in the face of the bracket but. at opposite sides of the shaft are arranged parallel guide-ways 7 In these guides-ways" are slidably received arms 8 which extend to opposite key sections to which they are respectively securedby lugs or bearings 9. At points near the key sections on the arms 8are pivot pins 10 over which are received links 11, to the other ends of which are secured angularly arranged blocks12. The bracket is provided with an outwardly extending hub or sleeve 13 on which: is-ro' tated a hand wheel 14 to which the blocks 12 are pivoted by pins 15;

' Assuming the core illustrated in'Figure 1, the operator rotates the wheel 14 until the sectionsv are, "drawn" t'ojbe in the" condition 1 inwardly totheir position, as shown in Figure 5, each section being provided with an aperture lfi through which the arm Son the oppo- 7 site section may pass. 'By arranging the arms, as shown, the core SGCiHOnS are capable of a n'iov'ement further toward the axis of the drawn outwardly along the shaft, moving the collapsed sections to a position outside of the plane of the core, as shown in Figures 6 and 7.

A slide bracket 20, similar to the bracket 5, is provided for the intermediate sections 3,

except that this bracket is secured to the shaft 1. The sections 3 are carried upon-angular arms 21 which slide in thebracket-2O and to these arms are pivotally connected links 22, which are also pivoted to the inner hand Wheel 23. A hub 24 on the bracket 20 serves as a bearing for the handwheel, a col lar 25'l1olding the Wheel in place and a groove and pin 26 limiting the movement of the hand wheel. By forming the arms 21 angula-rly, as

shown, there no interference with the arms. a 8 andthe core sect1ons 2, and by placing them on opposite sides of the shaft 1, the sections may be moved inwardly to an extent equal to the movement of the sections 2, 2. Itecesses 27 are cut in the rim of'the inner hand Wheel 1 to allow clearance for the links 22. By the mechanismrshovvn and described, it Will be seen that the intermediate sections 3, 3 may be Withdrawn from the tire after the sections 2,

2 are moved'to their outer collapsed position.

InQreaSsembling the core the movements are reversed.

The descriptionhasbeen limited, but it Will be understood that changes and modificationsmay be made, While the essentialfeatures of the lnvention are retalned.

What is clanned s:

, 1. In a collapsible core construction, a shaft, a bracket slidably mounted on the shaft, a second bracket also mounted on the shaft,

I a plurality ofcore sections arranged in pairs on opposite sides of the shaft, guide-ways In a collapsible core construction, a pair of brackets,one of said brackets being movable toward and from the other, parallel guide-Ways in the brackets at opposite sides of the shaft, a plurality of core sections arranged in pairs, arms attached to one pair I of sections slidable in one of the brackets,

and angular arms attached to the other pair of sections and receivable in the guide-Ways in the other bracket.

l. In a collapsible core construction, a plurality of core sections, parallel arms rigidly attachedto. certain of saidsections on opposite sides of the core center and in the plane of the core, and arms rigidly attached to the remaining sections and provided With angular offsets in parallel relation on opposite sides of the core center and outside of the plane of the core.. I v

5. In a'collapsible core construction, a plurality of core sections, a slidable bracket at the center of the core, parallel arms rigidly 'at-i tachcd to certain of the core sections and guided for radial movement in, the bracket,

angular arms attached to the other core sections, and asecond bracket for guidingthe angular arms for movement of the core seccore' center.

6. In a collapsible core construction, a plurality of core sect1ons,a shaft, a bracket slidtions supported thereby toward and fromthe ablymounted on the amine second bracket fastened to the shaft, parallel arms attached to certain of the core sections a and slidably received in the first namedbracket at opposite sides of theshai't, and arms having parallel offset portions slidably mounted in thejsecond bracket, the ar ns being attached at their out er ends to the remainlng core sections, the

offset portions being located on oppositesides of the shaft. I

7. In a collapsiblecoreconstruction, a plurality of core sections, opposite sections being movable inpair's, a shaft, a bracket'slidable on the shaft, parallel, unaligned guide-Ways in the bracket at opposite sides of the shaft, arms attached to certain core sections'and receivable in the guide-Ways, links attached to the arms, and an operating Wheel on] the bracket to which the linksare connected. 3

8. In a collapsible core construction, aplurality of core sections, opposite sectionsbeing movable in pairs, a shaft, a bracket onthe shaft, guide-Ways in the bracket at opposite sides of the shaft, angular arms, said armsfbe ing attached at one end to'certain core sections and at the other end being receivable in the guide-Ways, an'operating Wheel rotatably mounted on the bracket, and links connect ing the,v Wheel and the arms.

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